Thiol-ene Functionalization of Natural Fats for Polymer Synthesis
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Solution Overview
Problem
Current methods for functionalizing fatty substances of natural origin require multiple steps and often use expensive or toxic reagents, limiting their reactivity and suitability for polymer production.
Innovation Solution
A single-step thiol-ene reaction process introduces reactive functions into fatty substances of natural origin, using a thiol derivative and UV radiation or a thermal initiator, allowing for the production of polyfunctional derivatives suitable for polymer synthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multi-step functionalization processes are used, then reactive functions can be introduced into natural fats, but the process complexity increases and requires expensive or toxic reagents
Solution Approach 1:
The patent combines multiple functionalization steps into a single reaction step by using a thiol compound containing both the thiol group for radical addition and the desired functional group (amine, carboxylic acid, alcohol, or isocyanate). This merging of functions eliminates the need for separate introduction steps and reduces process complexity while avoiding expensive or toxic reagents.
Solution Approach 2:
The thiol compound used in the patent serves multiple functions simultaneously: it acts as the radical source for thiol-ene reaction, provides the desired functional group for polymerization, and enables direct functionalization of natural fats. This multi-functionality resolves the contradiction by achieving complex functionalization through a single universal reagent.
2Reliability
If traditional functionalization methods are used, then secondary alcohols are obtained, but their reactivity is limited compared to primary alcohols
Solution Approach 1:
The patent changes the key parameter of the functional group type introduced into natural fats by selecting thiol compounds with specific structures (primary thiols, amino thiols, carboxylic acid thiols). This parameter change directly improves reactivity by introducing primary alcohol functionalities or other highly reactive groups instead of secondary alcohols, while the thiol-ene reaction methodology remains straightforward.
3Adaptability or versatility
If existing thiol-ene reaction processes are used, then functionalized fats are obtained, but they cannot be used in polymer production by polycondensation
Solution Approach 1:
The patent applies local quality by introducing specific functional groups (amine, carboxylic acid, alcohol, isocyanate) at the molecular level through carefully selected thiol compounds. These localized functional groups enable polycondensation reactions and polymer production, transforming the bulk property of the fat from non-polymerizable to polymerizable while maintaining the overall thiol-ene reaction process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This process achieves high conversion rates and functionalization efficiency, reducing the need for extensive purification and enabling the use of biosourced reagents in polymer production, while minimizing the use of VOCs and toxic compounds.
Implementation Method 1
The invention relates to a one-step process for preparing a fat functionalized with reactive groups. The process of the invention employs a thiol-ene reaction. The invention relates to the application of the thiol-ene reaction for introducing reactive groups into fats of natural origin... under the action of UV radiation, or under the action of UV radiation and in the presence of a photoinitiator.
Implementation Method 2
The process can be carried out at a temperature between 0°C and the total degradation temperature of the natural fat, in the presence of a thermal initiator or a redox initiator... A thermal initiator is defined as any type of initiator that generates radicals through thermal decomposition.
Data Source
AI summary
The invention relates to a method for functionalizing natural fatty substances: According to said method, plant oils including at least two unsaturations and the derivatives thereof, fatty acids including at least one unsaturated compound and the derivatives thereof, and mixtures of same, are reacted with a thiol derivative of formula (I), at a temperature of between 0°C and the temperature of total degradation of the natural fatty substance and in the presence of a thermal initiator compound or a redox initiator, or by UV radiation, or by UV radiation and in the presence of a photoinitiator. The invention also relates to the resulting functionalized fatty substances and to the use thereof for the preparation of polymers. The invention further relates to a method for preparing polymers from at least one functionalized fatty substance obtained by said functionalization method.